190   typedef typename T2::elem_type eT2;  in apply()  typedef
192   typedef typename promote_type<eT1,eT2>::result out_eT;  in apply()
194   promote_type<eT1,eT2>::check();  in apply()
196   if( (is_same_type<eT1,out_eT>::no) && (is_same_type<eT2,out_eT>::yes) )  in apply()
204     const SpMat<eT2>& B = UB.M;  in apply()
215   if( (is_same_type<eT1,out_eT>::yes) && (is_same_type<eT2,out_eT>::no) )  in apply()
223     const SpMat<eT2>& B = UB.M;  in apply()
241     const SpMat<eT2>& B = UB.M;  in apply()
263   typedef typename T2::elem_type eT2;  in dense_plus_sparse()  typedef
265   typedef typename promote_type<eT1,eT2>::result out_eT;  in dense_plus_sparse()
267   promote_type<eT1,eT2>::check();  in dense_plus_sparse()